Coherent beam superposition of ten diode lasers with a Dammann grating.

  • Paboeuf D
  • Emaury F
  • de Rossi S
 et al. 
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Abstract

We demonstrate the use of a binary diffractive optical element in a very simple setup to convert the multilobed beam from a low fill factor array of coherent laser diodes into a quasi-Gaussian beam. The phase profile of the grating is determined with a phase retrieval algorithm. Experimentally, the conversion efficiency reaches more than 44%. We also establish that this setup can be used to make an effective measurement of the coherency of the laser array.

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Authors

  • David Paboeuf

  • Florian Emaury

  • Sébastien de Rossi

  • Raymond Mercier

  • Gaëlle Lucas-Leclin

  • Patrick Georges

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